2 handles, hot and cold. The hot is the one I'm having a problem with. Don't know the age, I'm guessing it's pretty old.

I'm putting up a three handle mixing valve. Ignore the middle diverter knob and you'll have your mixing valve. Shut the water off and remove the hot water stem and washer assembly. Replace the washer. Now run a finger nail around the seat to check for nicks or rough spots. If you find any the seat must be replaced as well. If the hot side went well it's a good idea to replace the cold side washer as well. Good luck and thank you for rating my answer. Tom

Ihave a sayco 300 bath and shower mixer, it was leaking water, when I shut off water still drips bath outlet, I change washers on both the hot, cold and mixer valve, the dripping stop, but when I open the shower I getting water both from the shower and the bath tub,
What have I done wrong,
ezra foster

I have a sayco 300 bath and shower mixer, it was leaking water when the water shut off, I change all the washers on all valves, but now I have water running to the bath tub as well as the shower,what have I done wrong please explain.
ezra foster

It is hard to find the old Sayco diverter stem, go to Lowe's they carry Sayco faucet stems, open the link below and you will see the kit it takes 2 O rings and one washer if one Oring is missing you will have this problem' Thanks.

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